如果时空穿梭是可能的，那从未来穿越回来的旅客在哪里呢？
If time travel is possible, where are the tourists from the future?
假使人人都彼此爱护，则天下安治；倘若人人都彼此交恶，则天下大乱。墨家主张兼爱。兼爱，指同时爱不同的人或事物。墨子主张爱无差别等级，不分厚薄亲疏。
有时候最简单的歌曲最难写。
Science is not about being right; it’s about being less wrong.
We're still in the first minutes of the first day of the Internet revolution.
In business, as in life, integrity is the currency that never loses value.